Rotary valve attachment



Patented Sept. 11, lg

PATENT FFH.

JAMES ALFRED KIDD, OF PETERSBURG, VIRGINA,'ASSGNOB OF ONE-THIRD TO STANLEY F. MASON, OF PETERSBURG, VIRGINIA.

ROTARY VALVE ATTACHBIIENT.

To all fio/tom it may concern.'

Be it known that I, JAMES A. Kinn, a citizen ot the United States, residing at Petersburg, in thecounty of Dinwiddie and State ot Virginia, have invented a newhand useful Rotary Valve Attachment, of which the following is a specification.

The present invention aims to provide novel means whereby, when the valve stem ot an internal combustion engine is reciprocated, rotary motion will be imparted to the valve for the purpose of grinding the valve, the valve spring being anti-trictionally supported, this application being a continuation of my prior application for Letters Patent on a rotary valveattachment, Serial No. 490,371, iiled on August 6, 1921.

lt is within the province of the disclosure to improve generally and to enhance the utility of devices ot that'type to which the invention appertains.

With the above and other objectsin view, which will appear as the description proceeds, the invention resides in the combination and arrangement of parts and in the details ot construction hereinafter described and claimed, it being understood that, within the scope of whatl is claimed, changes in the precise embodiment ot the invention shown can be made without departing 'from the spirit of the invention.

In the accompanying drawings z- Figure 1 shows in elevation, an engine equipped with the device forming the s ubject matter of this application; Figure 2 is a section on the line 2-2 of Figure 1; Figure 3 is a section on the line 3-3 of Figure 2; and Figure 4 is a tragmental plan showing a portion of the engine frame and the carrier whereon the actuating pawls are mounted.

The numeral 1 designates the 'frame of an internal combustion engine, the same having a valve seat 2. A bearing 3 is mounted in the trame 1 and the lower portion of the trame carries a bearing boss 4. A valve 5 cooperates with the seat 2 and is carried by a stem 6 mounted to reciprocate in the bearing The stem 6 cooperates with a tappet 7 mounted for reciprocation in the boss 4. The tappet 7 is actuated by a cam 8 on a cam shaft 9. A spring 10 surrounds a portion ot the stem 6, and, abutting against the frame l and cooperating with the stem, con- Ths application led September stitutes means for closing the valve 5 on the seat 2. The construction above described is common and may be changed depending upon the make ot' the engine, without departing from the `spirit of the invention. No novelty is claimed for the parts above described, saving in so tar as they may cooperate with parts hereinafter set forth.

A ratchet wheel 11 is secured to the stem 6 and is provided on its lower surface with radial teeth 12. The teeth 12 of adjacent ratchet wheels slope in opposite directions, as shown in Figure 1. The ratchet wheel 11 has a neclr14 attached by a securing element 15 to the stem 6. A washer 16 surrounds the neck 14 oi the ratchet wheel and holds the securingelement 15in place against endwise movement. The washer' 16 is provided with an annular recess 17, receiving the lower end of the spring 10. The washer 16 and the ratchetwheel 11 are provided with cooperating ball races 44, receiving balls 45. rllhe balls, obviously, constitute an anti-triction bearing ior the spring 10 and facilitates the rotation ot the valve 5.

The device embodies a trough-shaped carrier 1S including inner and outcr walls. rlhc carrier 13 is supported on the lower portion ot the 'trame 1 and abuts against the bosses 4. The inner wall of the carrier 1S has bendable iingers 19 engaged around the outermost bosses 4, as shown in Figure 4, to hold the carrier 18 in place.

Pairs of oppositely extended pawls 20 are provided, the lower ends of the pawls being disposed between the walls of the carrier 18, and being mounted thereon, for vertical swinging movement on pivot elements 21.r

'The upper ends of the pawls 20 ot each pair cooperate 'with the teeth 12 ot adjoining ratchet wheels 11. The resilient means Yfor holding the pawls 20 engaged with the teeth 12 ot' the ratchet wheels 11 may be oi any desired sort. ,lt preferred, a bowed spring may be located between the walls of the carrier 18, the spring having reversely curved ends 26, bearing on the under edges of the pawls 20, as shown in Figure 1, there being one spring tor each pair of pawls.

The operation ot the device will be understood readily from the foregoing, but it may be stated briefly that when the stems 6 move upwardly. the pawls 20 will click over the ratchet wheels 11, whereas, when the stems 6 move downwardly, the pawls 20 will impart rotation tothe stems 6 and consequently to the valves 5, through the instrumentality of the ratchet. Wheels ll. lVhen the valves 5 are rotated, as aforesaid, they will be ground, and be kept clear of carbon.

lVhat is claimed is l. The combination With the crank case of an engine, stems mounted for reciprocation and 'for rotation, and valves. on the stems, of ratchet Wheels on the stems and having oppositely slanting teeth; oppositely extended paivls cooperating With the teeth o't the ratchet Wheels; a single resilmy i-ently supported spring coacting with both pawls` and with the crank case to hold said pawls in operative relation to the ratchet Wheels; and means for mounting the pawls for pivotal movement.

2. In a device of the class described, an engine having bosses; valves mounted for reciprocation and for rotation; operating means for the valves, said means being mounted in the bosses, ratchet Wheels carried' by the stems of said valves; a carrier having means for engaging certain of the bosses; and pawls` pi-voted to the carrier and coacting with the ratchet Wheels to rotate the valves.

3i. As an article of manufacture, Jfor use iin. the making of a valve rotator, a troughshaped' carrier including Walls, one Wall being provided with bendable fingers; a paWl pivotally mounted between the Walls; and an actuating spring for the pawl, the actuating spring being housed between the Walls.

4. The combinationl with the crank case of an engine, stems mounted for reciprocation and for rotation and valves en the stems, of ratchet wheels on the stems and provided with necks, the ratchet Wheels. having oppositely slanting teeth, securing elements mounted in the necks and engaging the stems, washers about the stems and cooperating with the securing elements to prevent endwise movement thereof, anti-friction elements interposed' between the Washersv and the ratchet Wheels, springs cooperating with the Washers to close the valves oppositely extended 'paWls coacting` with the teeth of 50 the ratchet Wheels, a single resiliently supported spring coacting with both pawls and with the crank case to hold said pavvls in operative relation to the ratchet Wheels, and means tor mounting the paivls for pivotal movement.

In. testimony that I claim the foregoing as my own. I have hereto aiiixed my signature in the presence of tivo Witnesses.

JAMES' ALFRED KIDD.

Witnesses:

B. F. BROWN, Jol-1N E. TURLINGrroN, Jr. 

